Is it normal to have brown discharge after having a yeast infection? i am also on depo shot for contraceptive.

Vaginal discharge: No, this isn't normal. Any new or abnomral vaginal discharge should be professionally evaluated. Colored vaginal discharge (yellow, greenish, brown, etc) often means infection, which at your age often is due to STD (if you are sexually active). Was your yeast infection professionally diagnosed? Check back with your doctor -- you probably should be reexamined to learn the cause. Good luck!